Synthesis and Anti-Candida Activity of Cobalt(II) Complexes of Benzene-1,2-Dioxyacetic Acid (bdoaH(2)). X-Ray Crystal Structures of [Co(bdoa)(H(2)O)(3)] 3.5H(2)O and {[CO(phen)(3)](bdoa)}(2)24H(2)O (phen = 1,10-Phenanthroline)

Co(CH(3)CO(2))(2)4H(2)O reacts with benzene-1,2-dioxyacetic acid (bdoaH(2)) to give the Co(2+) complexes [Co(bdoa)(H(2)O)(3)]H(2)O (1a) and [Co(bdoa)(H(2)O)(3)] 3.5H(2)O (1b). Subsequent reaction of 1a with 1,10- phenanthroline produces [CO(phen)(3)] bdoa10H(2)O (2a) and {[CO(phen)(3)](bdoa)}(2)24H(2)O (2b). Molecular structures of 1b and 2b were determined crystallographically. In 1b the bdoa(2-)- ligates the metal by two carboxylate oxygens and two ethereal oxygens, whereas in 2b the bdoa(2-) is uncoordinated. The Mn(2+) and Cu(2+) complexes [Mn(bdoa)(phen)(2)]H(2)O (3) and [Cu(pdoa)(imid)(2)] (4) were also synthesised, 1a-4 and other metal complexes of bdoa H(2) (metal = Mn(2+), Co(2+) ,Cu(2+), Cu(+) ) were screened for their ability to inhibit the growth ofhe yeast Candida albicans. Complexes incorporating the 1,10-phenanthroline ligand were the most active.     

Interaction of [Rh(2)(O(2)CCH(3))(4)(H(2)O)(2)] and [Rh(2)(O(2)CCH(OH)Ph)(2)(phen)(2)(H(2)O)(2)](O(2)C-CH(OH)Ph)(2) With Sulfhydryl Compounds and Ceruloplasmin

The interaction of binuclear rhodium(II) complexes [Rh(2)(OOCCH(3))(4)(H(2)O)(2)], [Rh(2){OOCCH(OH)Ph}(2)(phen)(2)(H(2)O)(2)] {OOCCH(OH)Ph}(2), [Rh(2)(OOCCH(3))(2)(bpy)(2)(H(2)O)(2)](OOCCH(3))(2) and [Rh(2)Cl(2)(OOCMe)(2)(bpy)(2)](3H(2)O) with ceruloplasmin, cysteine, glutathione and coenzyme A have been investigated using. UV-Vis and CD spectroscopies. The complexes containing phen or bpy at pH = 7.4 and 4.0 are readily reduced with sulfhydryl compounds, while rhodium(II) acetate is relatively stable in these conditions. Complex [Rh(2){OOCCH(OH)Ph}(2)(phen)(2)(H(2)O)(2)] strongly changes structure of ceruloplasmin leading to the decrease of of alpha-helix content and loss of oxidase activity.     

三元钴配合物[Co（thy）（phen）（H2O）2]的合成、表征及荧光性能研究

用溶液法合成了钴的配合物[Co（thy）（phen）（H2O）2],对它进行了元素分析、红外光谱表征。其中硫代水杨酸和1,10-邻菲啰啉为双齿配位,分别与Co^2＋形成稳定的六,五元螯合环。并进一步研究了配合物和配体硫代水杨酸的荧光性质。     

Preparation and Molecular Structure of {[Ca(CHZ)2(H2O)](NTO)2⋅3.5H2O}n

The title compound {[Ca(CHZ)₂(H₂O)](NTO)₂⋅3.5H₂O}_n was synthesized by using an aqueous solution of calcium 3‐nitro‐1,2,4‐triazol‐5‐onate and carbohydrazide (CHZ, NH₂NHCONHNH₂). Its molecular structure was determined by X‐ray diffraction and its crystals have monoclinic form, with space group C2/c, where a=2.4483(4) nm, b=1.2581(2) nm, c =1.6269(3) nm, β=121.168(12)°, V=4.2879(13) nm³, Z=8, d_c=1.727 g⋅cm⁻³, μ (Mo K_α)=3.9 cm⁻¹, M=557.47, F(000)=2312. The coordination polyhedron is a tricapped trigonal prism in a tetradecahedron with a coordination number of nine. The whole molecule has many long chains formed through the carbohydrazide bridges, and every long chain is unlimited along the c axis. The long chains are linked by hydrogen bonds to form the crystal structure.     

配位聚合物[Zn(phen)(H_2O)_2SO_4]_n的合成与晶体结构

通过扩散法得到了一个新的配位聚合物[Zn(phen)(H2O)2SO4]n[phen=邻菲啰啉]。通过X-ray单晶衍射对配合物的结构进行了表征。配合物属单斜晶系,Cc空间群,晶胞参数:a=15.1399(10),b=14.1420(10),c=6.6994(5),α=90°,β=103.458(1)°,γ=90°,V=1395.01(17)3,Z=2,μ=0.752 mm-1,R1=0.0214,wR2=0.0602。     

稀土配合物[Ln(C3H7NO2)-x-(C3H4N2)(H2O)](ClO4)3(Ln=La,-x-=3;Ln=Pr,Nd,Sm,-x-=2)的合成、表征与热分析

合成了稀土高氯酸盐与咪唑、DL α 丙氨酸的4种配合物晶体。经傅里叶变换红外光谱(FTIR)、元素分析和化学分析测定后确定其组成为[Ln(C3H7NO2)x(C3H4N2)(H2O)](ClO4)3(Ln=La,x=3;Ln=Pr,Nd,Sm,x=2)。用差示扫描量热法(DSC)测定了4种配合物的热分解数据,4个配合物开始熔化分解的温度分别为502 5K,532 4K,495 7K,516 7K,配合物有较高的热稳定性。     

Synthesis and crystal structure of mer-nitroaquatriamminenitrosylruthenium(II) nitrate [RuNO(NH3)3(NO2)(H2O)](NO3)2

The reaction between mer-[RuNO(NH₃)₃(NO₂)(OH)]Cl·0.5H₂O and an excess of 16 M HNO₃ leads to the protonation of the starting complex and crystallization of the complex with a coordinated water molecule and nitrite anion. The crystal structure of the product has been determined. The coordinated water molecule tends to be a weak acid with a measured pK_a of 2.4.     

Synthesis and crystal structure of trans-nitrosoaquatetraammineruthenium(II) sulphate hydrosulphate, [Ru(NO)(NH3)4(H2O)](SO4)(HSO4)

The reaction between [RuNO(NH₃)₄OH]Cl₂ and an excess of 2 M H₂SO₄ leads to the protonation of the starting complex and crystallisation of the title complex with sulphate and hydrosulphate anions. The crystal structure of the product has been determined. The linear nitroso group and water molecule are coordinated in trans positions.     

Second-sphere Coordination of [Pt(bipy)(NH3)2]2+ by Dibenzo-crown Ethers. Solution Spectroscopic Studies and the Crystal and Molecular Structures of [Pt(bipy)(NH3)2.dibenzo-30-crown-10] [PF6]2.0.6 H2O and [Pt(bipy)(NH3)2.dibenzo-24-crown-8] [PF6]2

In addition to hydrogen bonding and Coulombic forces, charge transfer interactions stabilise the 1:1 adducts formed between [Pt(bipy)(NH₃)₂] ²⁺ and a series of dibenzo-3n-crown-n (n = 6–12) ethers as evidenced by ¹H NMR and UV-visible spectra in solution and by X-ray crystal structures (for n = 8 and 10) in the solid state. Mutual diamagnetic (ring current) shielding by the aromatic systems of host and guest results in dramatic upfield shifts of certain aromatic proton resonances on adduct formation, especially when n = 10 or 11. A broad charge-transfer absorption band at 350 nm attains its maximum intensity at n = 11 though stability constant measurements indicate optimum binding when n = 10. X-ray diffraction studies reveal that, when n = 8, only one of the crown ether benzo-rings interacts with the bipyridyl ligand in a charge-transfer sense. However, when n = 10, the macrocycle is sufficiently large and flexible to allow both benzo-rings to enter into stabilising interactions with the bipyridyl ligand such that the platinum complex is encapsulated by the host in a U-shaped cavity.     

配位聚合物[Cu(bipy)(H_2O)_2]SO_4的合成及晶体结构表征

在水醇溶液中合成了标题配位聚合物[Cu(bipy)(H2O)2]SO4(bipy=2,2-′bipyridine),进行了元素分析、X射线衍射等表征。X射线衍射结果表明,此配合物属单斜晶系,空间群为Cc,晶胞参数为:a=1.5138(2)nm,b=1.2455(8)nm,c=0.7001(8)nm,β=106.013(3)°,V=1.2690(0)nm3,Z=4,Dc=1.841 g/cm3,μ=1.913 mm-1,F(000)=716。配合物中的金属铜离子与一个2,2′-联吡啶、2个水分子配位,形成一个变形的四边形结构。配合物通过O-H…O氢键构建为三维超分子。     

稀土配合物[Ln_2(sba)_3(phen)_2(H_2O)_2](Ln=Eu,Tb)合成、表征和性质研究

在乙醇和水的混合溶剂中,利用辛二酸[Suberic acid=H2sba]、邻菲罗啉(Phen)合成了标题化合物,通过化学分析、元素分析、红外光谱、热分解等方法对配合物组成进行了分析和表征,并研究了两种配合物的荧光性质。     

超分子化合物[Zn(H2O)6](ada)(bipy)的水热合成和晶体结构

在水热条件下合成了结构新颖的超分子标题化合物,通过元素分析和X-射线单晶衍射仪等方法对超分子化合物进行了表征和测定.测定结果表明品体属三斜晶系,P-1空间群,晶胞参数a=0.764 8(2)nm,6=1.172 3(3)nm,c=1.583 7(5)nm,a=103.150(6)°β=90.450(5)°,γ=92.8...     

Hydrothermal synthesis,crystal structure and photoluminescent property of a novel 3-D [La2(C2O4)2(NO3)(OH)(H2O)] · 3H2O

A novel 3D [La₂(C₂O₄)₂(NO₃) (OH)(H₂O)] · 3H₂O 1 has been synthesized under hydrothermal conditions and characterized by elemental analyses, IR, TGA, X-ray powder diffraction, X-ray single crystal diffraction and photoluminescence. The bridging modes of both nitrates and oxalates in compound 1 are uncommon. We have unexpectedly generated an unusual compound by using the simplest ligands, oxalates and nitrates in the presence of nicotinate (HIN).     

两种基于DMBA原位分解的配位聚合物{[Y(C_2O_4)_(1.5)(H_2O)_2]·H_2O}_n和{[Y(C_2O_4)_(1.5)(H_2O)_3]·2H_2O}_n的合成及结构研究

以DMBA(1,3-二甲基巴比妥酸)为底物,通过其原位分解产物H2C2O4(草酸)的自组装,分别制备了两种新颖的由压力调控的二维层状配位聚合物{[Y(C2O4)1.5(H2O)2]·H2O}n(1)和{[Y(C2O4)1.5(H2O)3]·2H2O}n(2)。在水热合成条件下,考察了不同阳离子、阴离子及溶剂对终产物分离的影响。结果显示,配合物(1)的构筑需在Y(Ⅲ)离子及去离子水同时存在的条件下完成。在此基础上,对反应机理进行了初步探究,发现氧化反应、亲核加成反应及消除反应等多种有机转化过程或可诱导原位开环产物的形成。     

A mixed-type of azametallacrown containing [Mn6(pnhz)6(DMF)4(H2O)2] and [Mn6(pnhz)6(DMF)2(H2O)4] constructed by a flexible pentadentate ligand

A mixed-type of azametallacrown based on a flexible pentadentate N-propionyl ligand was reported, which exhibits not only the completely different arrangement of the metal centers but also diversely geometric configurations of the N-terminal ligands, and this complex can further assemble into a novel 3-D supramolecular structure using two different aza18-MC-6 as secondary building units (SBUs) via the intermolecular C–H?π, π–π and C–H?O interactions. Temperature-dependent magnetic susceptibility measurements of the title complex indicate that the complex presents significantly antiferromagnetic coupling among metal centers.     

氢键配合物[Mn(H_2O)_2(HNic)_2]晶体的合成及结构表征

用3d金属离子锰与2-羟基-3-吡啶羧酸配体合成出新的水杨酸式螯合具有三维网络结构的Mn(H_2O)_2(HNic)_2配合物。均三苯甲酸苯环上一、三、五位置上的羧基都有脱质子化进行各种不同的结合,利用这点水溶液合成氢键配合物Mn(H_2O)_2(HNic)。我们采用常规分析方法即元素分析谱等,对配合物进行了表征.利用X-射线衍射晶体结构分析,结果显示该配合物属于单斜晶系,空间群为P2(1)/c,每一各晶胞包含两个Mn(H_2O)_2(HNic)_2分子,一个2-羟基-3-吡啶羧酸分子,通过N原子质子化的H原子与临近2-羟基-3-吡啶羧酸分子上的羟基上O原子又形成了一个八元环的氢键结构,该配合物具有复杂的氢键结构。     

Synthesis,crystal structure and water-induced reversible crystal-to-amorphous transformation property of [Co2(2,4-pydc)2(bpa)(H2O)6](H2O)2

The dinuclear Co^II coordination compound with empirical formula [Co₂(2,4-pydc)₂(bpa)(H₂O)₆](H₂O)₂ (1); bpa = 1,2-bis(2,4-pyridyl)ethane, 2,4-pydc = 2,4-pyridinedicarboxylate anion, has been synthesized and õcharacterized by elemental analysis, single crystal X-ray diffraction, IR and UV–vis spectra, TGA and XRPD. Compound 1 is a symmetry-related dinuclear compound consisting of two six coordinated cobalt atoms, one bpa ligand, two 2,4-pydc ligands and two lattice water molecules. Each Co^II ion is coordinated by one oxygen atom and one nitrogen atom from 2,4-pydc bidentate chelate ligand, one nitrogen atom of bpa bidentate bridging ligand and three water molecules, giving a distorted octahedral geometry with CoN₂O₄ chromophore. The crystal packing of this compound reveals a novel 3D supramolecular network, formed by hydrogen-bonding and C–H⋯π interactions. Investigations of the dynamic structural transformation behavior demonstrate that the title compound exhibits a solvent-induced reversible crystal-to-amorphous transformation with chromotropism when exposed to water vapor. This indicates that the dehydrated amorphous form, Co₂(2,4-pydc)₂(bpa)(H₂O)₂ (1A), may be utilized as an indicator for humidity.     

Formation of a 1D water chain into the channel of a unique 3D hydrogen-bound coordination polymer {[Cd(μ-Cl)(4-pya)(H2O)]2 · 4H2O}∞ (4-pya = trans-4-pyridylacrylate)

A novel Cd(II)/4-pya coordination polymer {[Cd(μ-Cl)(4-pya)(H₂O)]₂ · 4H₂O}_∞ (1) (4-pya = trans-4-pyridylacrylate) was synthesized and structurally characterized. Single-crystal X-ray diffraction revealed that 1 consists of a 2D (4, 4) network constructed from the 4-pya bridging ligand and the dimeric [Cd(μ-Cl)]₂ cores, in which each six-coordinated Cd(II) ion adopts an octahedral coordination geometry. Each 2D layer is further stacked along the a axis through hydrogen bonding interactions to afford a 3D hydrogen-bound network. An infinite water chain is generated via hydrogen bonds into each resulting 1D channel. The luminescent properties of 1 in the solid state were investigated.